21708791

素因数分解:

${\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{647}}^1$

素因数の和:778

約数の個数: 16

約数和(自身を含む): 24494400

約数和(自身を除く): 2785609

約数列:

[1, 13, 29, 89, 377, 647, 1157, 2581, 8411, 18763, 33553, 57583, 243919, 748579, 1669907, 21708791]

約数ペア:

[(1, 21708791), (13, 1669907), (29, 748579), (89, 243919), (377, 57583), (647, 33553), (1157, 18763), (2581, 8411)]